var path = require('path')
var webpack = require('webpack')

module.exports = {
  entry : './src/main.js',
  output: {
    path      : path.resolve(__dirname, './dist'),
    publicPath: '/dist/',
    filename  : 'build.js',
    chunkFilename: 'chunk[id].js?[chunkhash]',
  },
  module: {
    rules: [
      {
        test: /\.css$/,
        use : [
          'vue-style-loader',
          'css-loader'
        ],
      },
      {
        test: /\.scss$/,
        use : [
          'vue-style-loader',
          'scss-loader'
        ],
      },
      {
        test   : /\.vue$/,
        loader : 'vue-loader',
        options: {
          loaders: {
            'scss': [
              'vue-style-loader',
              'css-loader',
              'sass-loader'
            ],
            'sass': [
              'vue-style-loader',
              'css-loader',
              'sass-loader?indentedSyntax'
            ]
          },
          // other vue-loader options go here
        }
      },
      {
        test   : /\.js$/,
        loader : 'babel-loader',
        exclude: /node_modules/
      },
      {
        // 正则匹配所有以.png,jpg,gif结尾的文件
        test: /\.(png|jpg|gif)$/,
        // 使用url-loader对图片进行处理
        use: [
          {
            loader: 'url-loader',
            // 将小于8K的图片以base64的形式打包到js文件中
            options: {
                limit     : 8192,
                outputPath: 'images/',
                name      : '[name].[ext]?[hash]',
                useRelativePath:true
            }
          }
        ]
      }
    ]
  },
  resolve: {
    alias: {
      'vue$': 'vue/dist/vue.esm.js',
      '@'   : path.resolve('./src/assets/img')
    },
    extensions: ['*', '.js', '.vue', '.json']
  },
  devServer: {
    historyApiFallback: true,
    noInfo            : true,
    overlay           : true
  },
  performance: {
    hints: false
  },
  devtool: '#eval-source-map'
}

if (process.env.NODE_ENV === 'production') {
  module.exports.devtool = '#source-map'
  // http://vue-loader.vuejs.org/en/workflow/production.html
  module.exports.plugins = (module.exports.plugins || []).concat([
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: '"production"'
      }
    }),
    new webpack.optimize.UglifyJsPlugin({
      sourceMap: true,
      compress : {
        warnings: false
      }
    }),
    new webpack.LoaderOptionsPlugin({
      minimize: true
    })
  ])
}
